1/**
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#include "identifier.h"
17
18#include <binder/scope.h>
19#include <compiler/core/pandagen.h>
20#include <typescript/checker.h>
21#include <ir/astDump.h>
22#include <ir/typeNode.h>
23#include <ir/base/decorator.h>
24#include <ir/base/scriptFunction.h>
25#include <ir/expressions/assignmentExpression.h>
26#include <ir/statements/functionDeclaration.h>
27#include <ir/statements/variableDeclarator.h>
28#include <ir/expression.h>
29
30namespace panda::es2panda::ir {
31
32void Identifier::Iterate(const NodeTraverser &cb) const
33{
34    if (typeAnnotation_) {
35        cb(typeAnnotation_);
36    }
37}
38
39void Identifier::Dump(ir::AstDumper *dumper) const
40{
41    dumper->Add({{"type", "Identifier"},
42                 {"name", name_},
43                 {"typeAnnotation", AstDumper::Optional(typeAnnotation_)},
44                 {"optional", AstDumper::Optional(IsOptional())}});
45}
46
47void Identifier::Compile(compiler::PandaGen *pg) const
48{
49    binder::ScopeFindResult res = pg->Scope()->Find(name_);
50    if (res.variable) {
51        pg->LoadVar(this, res);
52        return;
53    }
54
55    if (name_.Is("NaN")) {
56        pg->LoadConst(this, compiler::Constant::JS_NAN);
57        return;
58    }
59
60    if (name_.Is("Infinity")) {
61        pg->LoadConst(this, compiler::Constant::JS_INFINITY);
62        return;
63    }
64
65    if (name_.Is("globalThis")) {
66        pg->LoadConst(this, compiler::Constant::JS_GLOBAL);
67        return;
68    }
69
70    if (name_.Is("undefined")) {
71        pg->LoadConst(this, compiler::Constant::JS_UNDEFINED);
72        return;
73    }
74
75    pg->TryLoadGlobalByName(this, name_);
76}
77
78checker::Type *Identifier::Check(checker::Checker *checker) const
79{
80    if (!Variable()) {
81        if (name_.Is("undefined")) {
82            return checker->GlobalUndefinedType();
83        }
84
85        checker->ThrowTypeError({"Cannot find name ", name_}, Start());
86    }
87
88    const binder::Decl *decl = Variable()->Declaration();
89
90    if (decl->IsTypeAliasDecl() || decl->IsInterfaceDecl()) {
91        checker->ThrowTypeError({name_, " only refers to a type, but is being used as a value here."}, Start());
92    }
93
94    return checker->GetTypeOfVariable(Variable());
95}
96
97void Identifier::UpdateSelf(const NodeUpdater &cb, [[maybe_unused]] binder::Binder *binder)
98{
99    if (typeAnnotation_) {
100        typeAnnotation_ = std::get<ir::AstNode *>(cb(typeAnnotation_))->AsExpression();
101    }
102}
103
104}  // namespace panda::es2panda::ir
105